Quarterly report pursuant to Section 13 or 15(d)

Warrants - Summary of Warrants Outstanding (Detail)

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Warrants - Summary of Warrants Outstanding (Detail) (USD $)
9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2014
Range 1 [Member]
Sep. 30, 2014
Range 2 [Member]
Class of Warrant or Right [Line Items]          
Exercise Price       $ 1.50 $ 2.00
Warrants Outstanding 2,532,094 2,747,094 3,235,982 361,169 2,170,925
Expiration Dates       Jul. 31, 2017 Mar. 23, 2015